All Sliver creatures have “: This creature gets +1/+1 until end of turn.”
"Sure, I've seen agents of the Cabal here and there. Well, not here, and certainly not in any of the sliver labs. Oh dear, I've said too much."
—Apprentice researcher
If the creature type of a Sliver changes so it’s no longer a Sliver, it will no longer be affected by its own ability. Its ability will continue to affect other Sliver creatures.
01-07-2013
wotc
Abilities that Slivers grant, as well as power/toughness boosts, are cumulative. However, for some abilities, like flying, having more than one instance of the ability doesn’t provide any additional benefit.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.